From 2364735c8fc08615fd868244e9e00143c70c0c22 Mon Sep 17 00:00:00 2001
From: Philip Kelley <phkelley@hotmail.com>
Date: Fri, 9 Nov 2012 15:39:10 -0500
Subject: [PATCH] Fix implementation of strndup to not overrun

---
 src/util.h | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/src/util.h b/src/util.h
index 4f83d3bc1..3d00e9c85 100644
--- a/src/util.h
+++ b/src/util.h
@@ -42,12 +42,11 @@ GIT_INLINE(char *) git__strdup(const char *str)
 
 GIT_INLINE(char *) git__strndup(const char *str, size_t n)
 {
-	size_t length;
+	size_t length = 0;
 	char *ptr;
 
-	length = strlen(str);
-	if (n < length)
-		length = n;
+	while (length < n && str[length])
+		++length;
 
 	ptr = (char*)malloc(length + 1);
 	if (!ptr) {
@@ -55,7 +54,9 @@ GIT_INLINE(char *) git__strndup(const char *str, size_t n)
 		return NULL;
 	}
 
-	memcpy(ptr, str, length);
+	if (length)
+		memcpy(ptr, str, length);
+
 	ptr[length] = '\0';
 
 	return ptr;